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Math Help - can't rearrange simple equation!

  1. #1
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    can't rearrange simple equation!

    Hi. I feel a complete simpleton. How do I get this:

    (2 - x)2(3 - x) - (3 - x)

    to be this:

    (1 - x)(3 - x)2

    I am utterly stuck with this. Thanks for any help!
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  2. #2
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    Re: can't rearrange simple equation!

    (2 - x)^2(3 - x) - (3 - x)
    take (3-x) common and try solving, by expanding (2-x)^2
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  3. #3
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    Re: can't rearrange simple equation!

    thanx amul28. i don't know what i was doing wrong...

    (3 - x)[(2 - x)(2 - x) - 1] = (3 - x)(3 - 4x + x^2)
    = (3 - x)(3 - x)(1 - x)

    cheers
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  4. #4
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    Re: can't rearrange simple equation!

    (2-x)^2(3-x)-(3-x)=(3-x)((2-x)^2-1)=(3-x)(2-x-1)(2-x+1)=

    =(1-x)(3-x)^2
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